Simultaneous Nadir Overpasses (SNOs) between NOAA-21 and LANDSAT-8
TLE Epoch: 2025 10 18.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-21) NOAA-21 Lat/Lon Date Time(LANDSAT-8) LANDSAT-8 Lat/Lon    Distance(km)  Time Diff(sec)
 10/19/2025   22:36:47   ( -70.57,  16.42) 10/19/2025   22:37:57  ( -70.44,  17.49)   41.99                70
 10/19/2025   23:27:24   (  70.05,-175.47) 10/19/2025   23:27:29  (  70.07,-175.41)    2.57                 5
 10/20/2025   00:18:05   ( -69.95,  -7.99) 10/20/2025   00:16:59  ( -69.95,  -7.94)    1.97                66
 10/22/2025   14:53:30   ( -70.14, 132.87) 10/22/2025   14:54:30  ( -70.14, 132.93)    2.28                60
 10/22/2025   15:44:14   (  70.00, -59.60) 10/22/2025   15:43:57  (  70.03, -59.58)    3.11                17
 10/22/2025   16:34:46   ( -69.42, 108.58) 10/22/2025   16:33:35  ( -69.48, 107.30)   50.62                71
 10/25/2025   07:10:20   ( -70.10,-111.26) 10/25/2025   07:10:58  ( -70.07,-111.27)    3.06                38
 10/25/2025   08:01:04   (  69.96,  56.25) 10/25/2025   08:00:25  (  69.96,  56.22)    1.45                39
 10/27/2025   22:36:37   (  70.65,-163.67) 10/27/2025   22:37:46  (  70.57,-162.28)   52.04                69
 10/27/2025   23:27:09   ( -70.06,   4.59) 10/27/2025   23:27:23  ( -70.08,   4.64)    3.28                14
 10/28/2025   00:17:53   (  69.93, 172.09) 10/28/2025   00:16:51  (  69.91, 172.05)    2.33                62
 10/30/2025   14:53:17   (  70.10, -47.01) 10/30/2025   14:54:20  (  70.11, -47.05)    2.14                63
 10/30/2025   15:43:59   ( -70.03, 120.42) 10/30/2025   15:43:50  ( -70.01, 120.43)    2.49                 9
 10/30/2025   16:34:34   (  69.43, -71.38) 10/30/2025   16:33:24  (  69.51, -72.62)   49.22                70